Maintaining a Bloodline

I have a David Sherrill pair of BB Reds and want to continue that line. I have only that one pair and was wondering if I could maintain that line and keep it pure off of just that one pair? All my other birds are anywhere from 75% to 98% percent Sherrill BloodThanks Garrett

Comments

The only true method would be to have the same selection practice in mating and culling. Once removed the originators hands birds often begin to change. So e from environment, coops, and feeding practices but most from selection practice. One can breed hard on a line and not deviate from the line of birds but selection of breeder birds will change them be it pattern color or body and feather.